Window-blind.



No. 725,042. PATBNTED APR. 14, 1903. E. A. CLARK.

WINDOW BLIND.

APPLICATION FILED AUG. 23, 1902.

51 n new $01.

Emfl- Cl rk.

QXM b1 case:

UNITED STATES ELLSWORTII A. CLARK, OF BOULDER,

COLORADO, ASSIGNOR OF ONE-HALE TO T. L. KELLER, OF BOULDER, COLORADO.

lNDOW B LlND.

Application filed August 23,1902.

To aZZ whom, it may concern:

Be it known that I, ELLSWORTH A. CLARK, a citizen of the United States,residing at Boulder, in the county of Boulder and $tate of Colorado,have invented a new and useful Window-Blind, of which the following is aspecification.

This invention is an improved construction of window-blind,'the objectbeing to provide a blind which will exclude light, dust, insects,

dad, but permit a free circulation of air therethrough; and it isobvious that the principles of my invention can be applied to doors,window-blinds, sills, and, furthermore, can be employed in connectionwith panels, and, in fact, can be arranged in window-frames and entirelyavoid the use of blinds or shutters.

The invention consists, essentially, in arranging a series of horizontalslats within a 2o suitable frame, each slat having a plurality of ribsor strips arranged upon the opposite sides thereof, said ribs or stripsbeing arranged to alternate with each other, thereby excluding light,but providing a circuitous 2 5 passage for the air to pass through.

The invention consists also in certain de tails of constructionhereinafter fully described, and pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is aperspective view of a blind constructed in accordance with my invention.Fig. 2 is a sectional View of the same. Fig. 3 is a view showing therelative arrangement of the slats.

In carrying out my invention -I employ a frame A, which may be the frameof a window-blind, Window-sash, door-frame, or any other article, andwithin the said frame A, I arrange the slats B in parallel andhorizontal 0 order. Each slat B has ribs or strips B upon the upper facethereof and ribs or strips B upon the lower face thereof, and inpractice I prefer to arrange two ribs or strips upon the upper face andthree ribs or strips upon the Serial No. 120,819; (No model.)

lower face, and it will be noted that these ribs 4 5? or stripsalternate with each other, so that the lower strips or ribs of one slatextend down below the upper ribs or strips of the next lower slat. Thisarrangement prevents the passage of light, but permits the-passage ofair, thereby rendering the blind particularly adapted for ventilatingpurposes. The upper and lower pieces of the frame are also provided withribs or strips in order to complete the arrangements, as most clearlyshown 5 5 in Fig. 2.

It will thus be seen that I provide an exceedingly cheap and simpleconstruction of blind capable of use in a number of different places andone which will entirely exclude light and partially exclude dust andinsects, but which will not interfere in the least with the freecirculation of air.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is-

1. A window-blind comprising a frame and a series ofslats, each slathaving a plurality of ribs or strips upon both faces thereof, asspecified. I

2. .A window-blind comprising a frame and a series of flat horizontalslats, each slat having a plurality of ribs or strips upon both facesthereof, said strips or ribs being arranged alternately as specified.

3. A Window-blind comprising a frame and a series of fiat horizontalslats, each slat having a plurality of ribs or strips upon both facesthereof, said ribs or strips being arranged to alternate, the edges ofone series of ribs or 80 strips being adapted to extend beyond the edgesof the ribs or strips of the next adjacent slat, as specified.

ELLSWORTH A. CLARK.

Witnesses:

P. E. TEMPLE, W. A. KELLER.

